MSRC_CVE-2020-13962

Vulnerability from csaf_microsoft - Published: 2020-06-02 00:00 - Updated: 2021-12-16 00:00
Summary
Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL's error queue which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected regardless of the Qt version.)

Notes

Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
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{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2020-13962 Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL\u0027s error queue which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected regardless of the Qt version.) - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2020/msrc_cve-2020-13962.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL\u0027s error queue which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected regardless of the Qt version.)",
    "tracking": {
      "current_release_date": "2021-12-16T00:00:00.000Z",
      "generator": {
        "date": "2025-10-19T17:54:46.579Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2020-13962",
      "initial_release_date": "2020-06-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-12-16T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003ccbl2 qt5-qtsvg 5.12.11-3",
                "product": {
                  "name": "\u003ccbl2 qt5-qtsvg 5.12.11-3",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 qt5-qtsvg 5.12.11-3",
                "product": {
                  "name": "cbl2 qt5-qtsvg 5.12.11-3",
                  "product_id": "16857"
                }
              }
            ],
            "category": "product_name",
            "name": "qt5-qtsvg"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccbl2 qt5-qtsvg 5.12.11-3 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 qt5-qtsvg 5.12.11-3 as a component of CBL Mariner 2.0",
          "product_id": "16857-17086"
        },
        "product_reference": "16857",
        "relates_to_product_reference": "17086"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-13962",
      "notes": [
        {
          "category": "general",
          "text": "mitre",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "16857-17086"
        ],
        "known_affected": [
          "17086-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2020-13962 Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL\u0027s error queue which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected regardless of the Qt version.) - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2020/msrc_cve-2020-13962.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-12-16T00:00:00.000Z",
          "details": "5.12.11-3:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "17086-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "17086-1"
          ]
        }
      ],
      "title": "Qt 5.12.2 through 5.14.2 as used in unofficial builds of Mumble 1.3.0 and other products mishandles OpenSSL\u0027s error queue which can cause a denial of service to QSslSocket users. Because errors leak in unrelated TLS sessions an unrelated session may be disconnected when any handshake fails. (Mumble 1.3.1 is not affected regardless of the Qt version.)"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.